<SEC-DOCUMENT>0001104659-21-102190.txt : 20210809
<SEC-HEADER>0001104659-21-102190.hdr.sgml : 20210809
<ACCEPTANCE-DATETIME>20210809164031
ACCESSION NUMBER:		0001104659-21-102190
CONFORMED SUBMISSION TYPE:	S-8
PUBLIC DOCUMENT COUNT:		3
FILED AS OF DATE:		20210809
DATE AS OF CHANGE:		20210809
EFFECTIVENESS DATE:		20210809

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IRON MOUNTAIN INC
		CENTRAL INDEX KEY:			0001020569
		STANDARD INDUSTRIAL CLASSIFICATION:	REAL ESTATE INVESTMENT TRUSTS [6798]
		IRS NUMBER:				232588479
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		S-8
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-258637
		FILM NUMBER:		211157092

	BUSINESS ADDRESS:	
		STREET 1:		ONE FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110
		BUSINESS PHONE:		617-535-4781

	MAIL ADDRESS:	
		STREET 1:		ONE FEDERAL STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02110

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IRON MOUNTAIN INC/PA
		DATE OF NAME CHANGE:	20000201

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PIERCE LEAHY CORP
		DATE OF NAME CHANGE:	19960807
</SEC-HEADER>
<DOCUMENT>
<TYPE>S-8
<SEQUENCE>1
<FILENAME>tm2124504d1_s8.htm
<DESCRIPTION>FORM S-8
<TEXT>
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<P STYLE="text-align: center; margin-top: 0; margin-bottom: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>As filed with the Securities and Exchange Commission
on August 9, 2021</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: right"><B>Registration No. 333-</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<!-- Field: Rule-Page --><DIV STYLE="margin-top: 0; margin-bottom: 0; width: 100%"><DIV STYLE="font-size: 1pt; border-top: Black 2pt solid; border-bottom: Black 1pt solid">&nbsp;</DIV></DIV><!-- Field: /Rule-Page -->

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: center; margin-top: 0pt; margin-bottom: 0pt">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Washington, D.C. 20549</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 18pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM S-8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION STATEMENT UNDER THE<BR>
SECURITIES ACT OF 1933</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 18pt"><B>IRON MOUNTAIN
INCORPORATED<BR>
</B></FONT><FONT STYLE="font-size: 10pt">(Exact name of registrant as specified in its charter)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 54%; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>Delaware</B><BR>
(State or other jurisdiction of incorporation or<BR>
 organization)</FONT></TD>
    <TD STYLE="width: 1%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 45%; font-size: 10pt; text-align: center"><FONT STYLE="font-size: 10pt"><B>23-2588479</B><BR>
(I.R.S. Employer Identification No.)</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>One Federal Street, Boston, Massachusetts 02110<BR>
</B>(Address of Principal Executive Offices including zip code)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Iron
Mountain Incorporated 2013 Employee Stock Purchase Plan<FONT STYLE="font-size: 10pt"><BR>
</FONT></B></FONT><FONT STYLE="font-size: 10pt">(Full title of the plan)</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-size: 10pt">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>William L. Meaney</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>President and Chief Executive Officer </B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Iron Mountain Incorporated</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>One Federal Street</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Boston, Massachusetts 02110</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(617) 535-4766<BR>
</B>(Name and address, including zip code, and telephone number, including area code, of agent for service)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>Copy to:</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>William J. Curry, Esq.<BR>
Sullivan &amp; Worcester LLP<BR>
One Post Office Square<BR>
Boston, Massachusetts 02109<BR>
(617) 338-2800</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Indicate by check mark whether the registrant is a large accelerated
filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company.&nbsp;&nbsp;See definitions
of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer,&rdquo; &ldquo;smaller reporting company,&rdquo; and &ldquo;emerging
growth company&rdquo; in Rule 12b-2 of the Exchange Act.&nbsp;&nbsp;(Check one):</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="font-size: 10pt; width: 58%"><FONT STYLE="font-size: 10pt">Large accelerated filer <FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#120;</FONT></FONT></FONT></TD>
    <TD STYLE="font-size: 10pt; width: 42%"><FONT STYLE="font-size: 10pt">Accelerated filer <FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Non-accelerated filer&nbsp;<FONT STYLE="font-family: Wingdings">&#168;</FONT>
    (Do not check if a smaller reporting company)</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Smaller reporting company <FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Emerging growth company <FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="font-family: Times New Roman, Times, Serif">If an emerging
growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any
new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. </FONT><FONT STYLE="font-family: Wingdings"><FONT STYLE="font-family: Wingdings">&#168;</FONT></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>CALCULATION OF REGISTRATION FEE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B></B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD COLSPAN="9">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="border-bottom: Black 2pt double; width: 32%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Title of Securities to be Registered</B></FONT></TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 11%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Amount to be Registered(1)</B></FONT></TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 19%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Proposed Maximum<BR>
Offering Price<BR>
Per Share(2)</B></FONT></TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 19%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Proposed Maximum<BR>
Aggregate Offering<BR>
Price(2)</B></FONT></TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 2pt double; width: 15%; text-align: center"><FONT STYLE="font-size: 10pt"><B>Amount of<BR>
Registration Fee(3)</B></FONT></TD></TR>
  <TR>
    <TD STYLE="border-bottom: Black 1pt solid"><FONT STYLE="font-size: 10pt">Common Stock, $0.01 par value per share</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt">1,000,000</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt">$43.79</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt">$43,790,000</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; text-align: center"><FONT STYLE="font-size: 10pt">$4,777.59</FONT></TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(1)</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pursuant to Rule&nbsp;416 under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), this Registration Statement on Form S-8 (this &ldquo;Registration Statement&rdquo;) shall also cover any additional shares of Iron Mountain Incorporated (the &ldquo;Company&rdquo; or &ldquo;Registrant&rdquo;) common stock, par value $0.01 per share (&ldquo;Common Stock&rdquo;), that become issuable under the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan (the &ldquo;Plan&rdquo;) by reason of any stock dividend, stock split, reclassification, recapitalization, spin-off or any other similar transaction that results in an increase in the number of shares of Common Stock.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(2)</FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Estimated solely for the purpose of calculating the registration fee pursuant to Rules&nbsp;457(c) and 457(h) promulgated under the Securities Act. The proposed maximum offering price per share is based upon the average of the high and low prices of Common Stock on August 3, 2021, as reported on the New York Stock Exchange.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="border-bottom: Black 1pt solid; width: 24px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(3)</FONT></TD>
    <TD STYLE="border-bottom: Black 1pt solid; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Rounded up to the nearest penny.</FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0pt; margin-bottom: 0pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0pt; margin-bottom: 0pt">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0pt; margin-bottom: 0pt"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: left; margin-top: 0pt; margin-bottom: 0pt"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>EXPLANATORY NOTE</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"><FONT STYLE="background-color: white">This Registration
Statement on Form S-8 (this &ldquo;Registration Statement&rdquo;) is being filed to register 1,000,000 shares of common stock of Iron
Mountain Incorporated (the &ldquo;Registrant&rdquo; or the &ldquo;Company&rdquo;), par value $0.01 per share, reserved for issuance under
</FONT>the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan<FONT STYLE="background-color: white">, as amended (the &ldquo;Plan&rdquo;),
pursuant to an amendment approved on May 12, 2021 by stockholders owning a majority in voting interest of the Company&rsquo;s voting capital
stock at the Company&rsquo;s 2021 Annual Stockholders&rsquo; Meeting.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART I</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The documents containing the information specified
in Part I will be sent or given to participants in the Plan, as specified by Rule 428(b)(1) of the Securities Act. Such documents will
not be filed with the Commission either as part of this Registration Statement or as prospectuses or prospectus supplements pursuant to
Rule 424 of the Securities Act. These documents and the documents incorporated by reference pursuant to Item 3 of Part II of this Registration
Statement, taken together, constitute a prospectus as required by Section 10(a) of the Securities Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PART II</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"><B>Item 3.</B></TD><TD><B>Incorporation of Documents by Reference.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The following documents, which have been filed
with the Commission by the Registrant, are incorporated by reference in this Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">(1)</TD><TD><A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1020569/000102056921000067/irm-20201231.htm" STYLE="-sec-extract: exhibit">the Annual Report on Form 10-K for the fiscal year ended December&nbsp;31, 2020, filed on February 24, 2021 (including the exhibits thereto);</A></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">(2)</TD><TD>the portions of the <A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000120677421000973/irm3816531-def14a.htm" STYLE="-sec-extract: exhibit">Definitive Proxy Statement on Schedule 14A for the 2021 Annual Meeting of Stockholders filed on April 2, 2021</A>
that are incorporated by reference in the <A HREF="https://www.sec.gov/ix?doc=/Archives/edgar/data/1020569/000102056921000067/irm-20201231.htm" STYLE="-sec-extract: exhibit">Annual Report on Form 10-K for the year ended December 31, 2020;</A></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">(3)</TD><TD>all other reports filed with the Commission pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended
(the &ldquo;Exchange Act&rdquo;), since the end of the fiscal year covered by the Registrant&rsquo;s Annual Report referred to in (1)
above; and</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"></TD><TD STYLE="width: 0.5in">(4)</TD><TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000110465915003541/a15-2519_1ex4d1.htm" STYLE="-sec-extract: exhibit">the description of the Registrant&rsquo;s Common Stock contained in the Registrant&rsquo;s Current Report on Form 8-K, and Exhibit 4.1 thereto, filed with the Commission on January 21, 2015, and including all further amendments and reports filed for the purpose of updating such description.</A></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In addition, all documents filed by the Registrant
pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act (other than portions of those made pursuant to Item 2.02 or Item 7.01
of Form 8-K or other information &ldquo;furnished&rdquo; and not filed with the Commission), subsequent to the effective date of this
Registration Statement, but prior to the filing of a post-effective amendment to this Registration Statement indicating that all securities
offered hereby have been sold or deregistering all securities then remaining unsold, shall be deemed to be incorporated by reference herein
and to be a part hereof from the date of filing of such documents. Any statement contained in a document incorporated or deemed to be
incorporated by reference herein and to be a part hereof shall be deemed to be modified or superseded for purposes of this Registration
Statement to the extent that a statement contained herein or in any other subsequently filed document which also is or is deemed to be
incorporated by reference herein modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed,
except as so modified or superseded, to constitute a part of this Registration Statement.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"><B>Item 4.</B></TD><TD><B>Description of Securities.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

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<TD STYLE="width: 0.5in"><B>Item 5.</B></TD><TD><B>Interests of Named Experts and Counsel.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"><B>Item 6.</B></TD><TD><B>Indemnification of Directors and Officers.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Section 102 of the Delaware Corporation Law permits
a corporation to include a provision in its Certificate of Incorporation eliminating or limiting the personal liability of a director
to a corporation or its stockholders for monetary damages for certain breaches of the director's fiduciary duty, except (1) for any breach
of the director's duty of loyalty to the corporation or its stockholders, (2) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (3) the payment of unlawful dividends or unlawful stock repurchases or redemptions
or (4) transactions from which the director received an improper personal benefit.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Section 145 of the Delaware Corporate Law (&ldquo;Section
145&rdquo;) authorizes a corporation to indemnify its directors, officers, employees and agents against certain liabilities (including
attorney's fees, judgments, fines and expenses) they may incur in their capacities as such in connection with specified actions, suits
or proceedings, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation,
or a derivative action), if they acted in good faith and in a manner they reasonably believed to be in or not opposed to the best interests
of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe their conduct was unlawful.
Section 145 also provides that directors and officers have a right to indemnification against expenses where they have been successful
on the merits or otherwise in defense of such actions. A similar standard is applicable in the case of derivative actions, except that
indemnification only extends to expenses (including attorneys' fees) incurred in connection with defense or settlement of such action,
and the statute requires court approval before there can be any indemnification where the person seeking indemnification has been found
liable to the corporation. Section 145 also authorizes a corporation to advance expenses incurred in defending such actions, suits or
proceedings in advance of their final disposition. Section 145 empowers the corporation to purchase and maintain insurance on behalf of
any directors, officers, employees and agent, against any liability asserted against such person and incurred by such person in any such
capacity, whether or not the corporation would have the power to indemnify such person against such liability under Section 145.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Company&rsquo;s Certificate of Incorporation
includes provisions eliminating the personal liability of the Company&rsquo;s directors to the fullest extent permitted by Delaware Corporate
Law, and the Company&rsquo;s Bylaws include provisions indemnifying the Company&rsquo;s directors and officers to the fullest extent permitted
by Delaware Corporate Law.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"><B>Item 7.</B></TD><TD><B>Exemption from Registration Claimed.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Not applicable.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0.5in"><B>Item 8.</B></TD><TD><B>Exhibits.</B></TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The following exhibits are filed as part of this
Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="border-bottom: Black 1pt solid; width: 9%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>EXHIBIT<BR>
 NO.</B></FONT></TD>
    <TD STYLE="padding-bottom: 1pt; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 1pt; width: 90%">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>DESCRIPTION</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746914010080/a2222572zdefm14a.htm#hg15201_annex_b-1" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.1</FONT></A></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746914010080/a2222572zdefm14a.htm#hg15201_annex_b-1" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Incorporation of the Company, as filed with the Secretary of State of the State of Delaware on June 26, 2014, as corrected by the Certificate of Correction of the Company filed with the Secretary of State of the State of Delaware on June 30, 2014. (Incorporated by reference to Annex B-1 to the Iron Mountain Incorporated Proxy Statement for the Special Meeting of Stockholders, filed with the Securities and Exchange Commission on December 23, 2014, File No. 001-13045.)</FONT></A></TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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<P STYLE="margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 9%"><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000110465915003541/a15-2519_1ex3d2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.2</FONT></A></TD>
    <TD STYLE="text-align: center; width: 1%">&nbsp;</TD>
    <TD STYLE="width: 90%"><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000110465915003541/a15-2519_1ex3d2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Merger, filed by the Company, effective as of January 20, 2015. (Incorporated by reference to the Company&rsquo;s Current Report on Form 8-K dated January 21, 2015, File No 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000102056921000165/exhibit31bylawsproxyaccess.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.3</FONT></A></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000102056921000165/exhibit31bylawsproxyaccess.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Bylaws of the Company. (Incorporated by reference to the Company&rsquo;s Current Report on Form 8-K dated May 17, 2021, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746913004771/a2214453zdef14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.4</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746913004771/a2214453zdef14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (Incorporated by reference to Annex A to the Iron Mountain Incorporated Proxy Statement for the 2013 Annual Meeting of Stockholders, filed with the Securities and Exchange Commission on April 24, 2013, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000120677421000973/irm3816531-def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.5</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000120677421000973/irm3816531-def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">First Amendment to the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (Incorporated by reference to Annex B to the Iron Mountain Incorporated Proxy Statement, filed with the Securities and Exchange Commission on April 2, 2021, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion of Sullivan&nbsp;&amp; Worcester LLP. (Filed herewith.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Sullivan&nbsp;&amp; Worcester LLP. (Included in Exhibit&nbsp;5.1.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex23-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.2</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex23-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Deloitte&nbsp;&amp; Touche LLP. (Filed herewith.) </FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="#POWEROFATTORNEY"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="#POWEROFATTORNEY"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Power of Attorney. (Included on the signature page to this Registration Statement.)</FONT></A></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 0.5in"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Item 9.</B></FONT></TD>
    <TD><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>Undertakings.</B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The Company hereby undertakes:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(a) (1) To file, during any period in which offers
or sales are being made, a post-effective amendment to this Registration Statement:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(i) to include any prospectus required by Section
10(a)(3) of the Securities Act;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(ii) to reflect in the prospectus any facts or
events arising after the effective date of this Registration Statement (or the most recent post-effective amendment thereof) which, individually
or in the aggregate, represent a fundamental change in the information set forth in this Registration Statement. Notwithstanding the foregoing,
any increase or decrease in the volume of securities offered (if the total dollar value of securities offered would not exceed that which
was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus
filed with the Commission pursuant to Rule 424(b) of the Securities Act if, in the aggregate, the changes in volume and price represent
no more than a 20% change in the maximum aggregate offering price set forth in the &ldquo;Calculation of Registration Fee&rdquo; table
in the effective Registration Statement; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(iii) to include any material information with
respect to the plan of distribution not previously disclosed in this Registration Statement or any material change to such information
in this Registration Statement;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) of this
section do not apply if the registration statement is on Form S-8 and the information required to be included in a post-effective amendment
by those paragraphs is contained in reports filed with or furnished to the Commission by the registrant pursuant to Section 13 or Section
15(d) of the Exchange Act that are incorporated by reference in this Registration Statement;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(2) That, for the purpose of determining any liability
under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities
offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(3) To remove from registration by means of a post-effective
amendment any of the securities being registered which remain unsold at the termination of the offering.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(b) The Company hereby further undertakes, that,
for purposes of determining any liability under the Securities Act, each filing of the Company&rsquo;s annual report pursuant to Section
13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan&rsquo;s annual report pursuant
to Section 15(d) of the Exchange Act) that is incorporated by reference in this Registration Statement shall be deemed to be a new registration
statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial
bona fide offering thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">(c) Insofar as indemnification for liabilities
arising under the Securities Act may be permitted to directors, officers and controlling persons of the Company pursuant to the foregoing
provisions, or otherwise, the Company has been advised that in the opinion of the Commission such indemnification is against public policy
as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities
(other than the payment by the Company of expenses incurred or paid by a director, officer or controlling person of the Company in the
successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the
securities being registered, the Company will, unless in the opinion of its counsel the matter has been settled by controlling precedent,
submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in
the Securities Act and will be governed by the final adjudication of such issue.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SIGNATURES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form&nbsp;S-8 and has duly caused
this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Boston, Commonwealth
of Massachusetts, on August 9, 2021.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD></TD>
    <TD COLSPAN="2"><FONT STYLE="font: 10pt Times New Roman, Times, Serif"><B>IRON MOUNTAIN INCORPORATED</B></FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="2">&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%"></TD>
    <TD STYLE="width: 4%"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">By:</FONT></TD>
    <TD STYLE="border-bottom: black 1pt solid; width: 46%"><FONT STYLE="font: 10pt Times New Roman, Times, Serif">/s/ William L. Meaney</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD></TD>
    <TD><FONT STYLE="font: 10pt Times New Roman, Times, Serif">William L. Meaney</FONT></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P></TD>
    <TD>President and Chief Executive Officer<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><A NAME="POWEROFATTORNEY"></A><B>POWER OF ATTORNEY</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">We, the undersigned officers and directors of Iron Mountain Incorporated,
hereby severally constitute and appoint William L. Meaney, Barry Hytinen and Deborah Marson, and each of them acting singly, our true
and lawful attorneys-in-fact, with full power to them in any and all capacities, to sign any amendments, including any post-effective
amendments, to this Registration Statement and to file the same, with exhibits thereto and other documents in connection therewith, with
the Securities and Exchange Commission, granting unto each of said attorneys-in-fact, acting singly, full power and authority to do and
perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes
as he or she might or could do in person, hereby ratifying and confirming our signatures to said amendments to the Registration Statement
signed by our said attorneys-in-fact and all else that said attorneys-in-fact may lawfully do and cause to be done by virtue hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Pursuant to the requirements of the Securities Act, this Registration
Statement has been signed by the following persons in the capacities and on the dates indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 25%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>SIGNATURE</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 48%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>TITLE</B></FONT></TD>
    <TD STYLE="width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 25%; border-bottom: black 1pt solid; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt"><B>DATE</B></FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ William L. Meaney</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">President, Chief Executive Officer and Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">William L. Meaney</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal Executive Officer)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">/s/ Barry Hytinen</P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Executive Vice President and Chief Financial Officer</P></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Barry Hytinen</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">(Principal Financial Officer and Principal Accounting Officer)</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Jennifer Allerton</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Jennifer Allerton</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Pamela Arway</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Pamela Arway</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>

<TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Clarke H. Bailey</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Clarke H. Bailey</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Kent P. Dauten</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Kent P. Dauten</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
</TABLE>

<P STYLE="margin: 0">&nbsp;</P>

<P STYLE="margin: 0"></P>

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<P STYLE="margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid; width: 25%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Monte Ford</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; width: 48%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom; width: 1%">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; width: 25%"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Monte Ford</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Per-Kristian Halvorsen</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Per-Kristian Halvorsen</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Robin L. Matlock</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Robin L. Matlock</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Wendy J. Murdock</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Wendy J. Murdock</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Walter C. Rakowich</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Walter C. Rakowich</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Doyle R. Simons</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Doyle R. Simons</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  <TR>
    <TD STYLE="vertical-align: top; border-bottom: black 1pt solid"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">/s/ Alfred J. Verrecchia</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Director</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">August 9, 2021</FONT></TD></TR>
  <TR>
    <TD STYLE="vertical-align: top"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Alfred J. Verrecchia</FONT></TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center">&nbsp;</TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>EXHIBIT INDEX</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; text-align: center"><B></B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: left"><B>&nbsp;</B></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%">
  <TR STYLE="vertical-align: bottom">
    <TD STYLE="border-bottom: Black 1pt solid; width: 9%">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>EXHIBIT<BR>
 NO.&nbsp;</B></P></TD>
    <TD STYLE="padding-bottom: 1pt; width: 1%; text-align: center">&nbsp;</TD>
    <TD STYLE="border-bottom: Black 1pt solid; padding-bottom: 1pt; width: 90%">
    <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>DESCRIPTION</B></P></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746914010080/a2222572zdefm14a.htm#hg15201_annex_b-1" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.1</FONT></A></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746914010080/a2222572zdefm14a.htm#hg15201_annex_b-1" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Incorporation of the Company, as filed with the Secretary of State of the State of Delaware on June 26, 2014, as corrected by the Certificate of Correction of the Company filed with the Secretary of State of the State of Delaware on June 30, 2014. (Incorporated by reference to Annex B-1 to the Iron Mountain Incorporated Proxy Statement for the Special Meeting of Stockholders, filed with the Securities and Exchange Commission on December 23, 2014, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000110465915003541/a15-2519_1ex3d2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.2</FONT></A></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000110465915003541/a15-2519_1ex3d2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Certificate of Merger, filed by the Company, effective as of January 20, 2015. (Incorporated by reference to the Company&rsquo;s Current Report on Form 8-K dated January 21, 2015, File No 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000102056921000165/exhibit31bylawsproxyaccess.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.3</FONT></A></TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000102056921000165/exhibit31bylawsproxyaccess.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Bylaws of the Company. (Incorporated by reference to the Company&rsquo;s Current Report on Form 8-K dated May 17, 2021, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD STYLE="text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746913004771/a2214453zdef14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.4</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000104746913004771/a2214453zdef14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (Incorporated by reference to Annex A to the Iron Mountain Incorporated Proxy Statement for the 2013 Annual Meeting of Stockholders, filed with the Securities and Exchange Commission on April 24, 2013, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000120677421000973/irm3816531-def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">4.5</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="https://www.sec.gov/Archives/edgar/data/1020569/000120677421000973/irm3816531-def14a.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">First Amendment to the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan. (Incorporated by reference to Annex B to the Iron Mountain Incorporated Proxy Statement, filed with the Securities and Exchange Commission on April 2, 2021, File No. 001-13045.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">5.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Opinion of Sullivan&nbsp;&amp; Worcester LLP. (Filed herewith.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex5-1.htm"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Sullivan&nbsp;&amp; Worcester LLP. (Included in Exhibit&nbsp;5.1.)</FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="tm2124504d1_ex23-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">23.2</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="tm2124504d1_ex23-2.htm" STYLE="-sec-extract: exhibit"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Consent of Deloitte&nbsp;&amp; Touche LLP. (Filed herewith.) </FONT></A></TD></TR>
  <TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
  <TR STYLE="vertical-align: top">
    <TD><A HREF="#POWEROFATTORNEY"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">24.1</FONT></A></TD>
    <TD>&nbsp;</TD>
    <TD><A HREF="#POWEROFATTORNEY"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">Power of Attorney. (Included on the signature page to this Registration Statement.)</FONT></A></TD></TR>
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<TYPE>EX-5.1
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<DESCRIPTION>EXHIBIT 5.1
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<P STYLE="text-align: right; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 4.5in; text-indent: 1in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right; margin: 0pt 0 0pt 4.5in; text-indent: 1in">Exhibit 5.1</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; text-align: right; margin: 0pt 0 0pt 4.5in; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0 0pt 4.5in; text-align: right; text-indent: 0.5in">August 9, 2021</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Iron Mountain Incorporated</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">One Federal Street</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Boston, Massachusetts 02110</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
  <TR STYLE="vertical-align: top">
    <TD STYLE="width: 48px; font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B>Re:</B></FONT></TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-family: Times New Roman, Times, Serif"><B><U>Registration of Shares under the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan </U></B></FONT></TD></TR>
  </TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">Dear Ladies and Gentlemen:</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In connection with the registration under the Securities
Act of 1933, as amended (the &ldquo;Act&rdquo;), by Iron Mountain Incorporated, a Delaware corporation (the &ldquo;Company&rdquo;), of
an additional 1,000,000 shares of its common stock, par value $0.01 per share (the &ldquo;Registered Shares&rdquo;), that are to be offered
and may be issued under the Iron Mountain Incorporated 2013 Employee Stock Purchase Plan (the &ldquo;2013 Plan&rdquo;), the following
opinion is furnished to you to be filed with the Securities and Exchange Commission (the &ldquo;Commission&rdquo;) as Exhibit 5.1 to the
Company&rsquo;s Registration Statement on Form S-8 (the &ldquo;Registration Statement&rdquo;) under the Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">In connection with this opinion letter, we have
examined and relied upon a copy of the Registration Statement, the 2013 Plan, the Company&rsquo;s Certificate of Incorporation as presently
in effect and originals or copies of such records, agreements and instruments of the Company, certificates of public officials and of
officers of the Company and such other documents and records, and such matters of law, as we have deemed appropriate as a basis for the
opinions expressed herein. In rendering such opinions, we have assumed the genuineness of all signatures, the legal capacity of natural
persons, the authenticity of all documents submitted to us as originals and the conformity to the authentic original documents of all
documents submitted to us as copies, which facts we have not independently verified. As to any facts material to the opinions expressed
herein, we have relied without independent verification upon certificates of public officials, upon statements of officers or other representatives
of the Company and statements of fact contained in documents we have examined.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">This opinion is limited solely to the General Corporation
Law of the State of Delaware, and we express no opinion as to the effect on the matters covered by this opinion of the laws of any other
jurisdiction. We are not rendering any opinion as to compliance with any federal or state antifraud law, rule or regulation relating to
securities, or to the sale or issuance thereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">Based on and subject to the foregoing, we are of
the opinion that the issuance of the Registered Shares has been duly authorized and, when issued in accordance with the terms of the 2013
Plan and the options or other rights granted thereunder, the Registered Shares will be validly issued, fully paid and nonassessable by
the Company.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.5in">The opinion set forth herein is rendered as of
the date hereof, and we assume no obligation to update such opinion to reflect any facts or circumstances which may hereafter come to
our attention or any changes in the law which may hereafter occur. This opinion is rendered to you in connection with the filing of the
Registration Statement. This opinion may not be relied upon for any other purpose, or furnished to, quoted or relied upon by any other
person, firm or corporation for any purpose, without our prior written consent, except that (i) this opinion may be furnished or quoted
to judicial or regulatory authorities having jurisdiction over you, and (ii) this opinion may be relied upon by purchasers and holders
of the Registered Shares currently entitled to rely on it pursuant to applicable provisions of federal securities law. We hereby consent
to the filing of this opinion letter as Exhibit 5.1 to the Registration Statement. In giving such consent, we do not thereby admit that
we come within the category of persons whose consent is required under Section 7 of the Act or under the rules and regulations of the
Commission promulgated thereunder.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<TR STYLE="vertical-align: top; text-align: left">
  <TD STYLE="width: 50%">&nbsp;</TD>
  <TD STYLE="width: 50%">Very truly yours,</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD>&nbsp;</TD>
  <TD>/s/ Sullivan &amp; Worcester LLP</TD></TR>
<TR STYLE="vertical-align: top; text-align: left">
  <TD>&nbsp;</TD>
  <TD>Sullivan &amp; Worcester LLP</TD></TR>
</TABLE>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"></P>

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<TYPE>EX-23.2
<SEQUENCE>3
<FILENAME>tm2124504d1_ex23-2.htm
<DESCRIPTION>EXHIBIT 23.2
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<P STYLE="text-align: right; font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><B>Exhibit 23.2</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white"><B>CONSENT OF INDEPENDENT REGISTERED
PUBLIC ACCOUNTING FIRM</B></FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white">We consent to the incorporation
by reference in this Registration Statement on Form S-8 of our reports dated February 24, 2021 relating to the financial statements of
Iron Mountain Inc., and the effectiveness of Iron Mountain Inc.'s internal control over financial reporting, appearing in the Annual Report
on Form 10-K of Iron Mountain Inc. for the year ended December 31, 2020.</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">/s/ DELOITTE &amp; TOUCHE LLP</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white">Boston, Massachusetts</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white">August 9, 2021</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white">&nbsp;</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0"><FONT STYLE="background-color: white"></FONT></P>

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